package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        //明文密码
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        //获取加密之后的密文
        String pwd = DigestUtils.md5DigestAsHex(password.getBytes());

        //拿到密文与数据库中的密码做比较
        if (!pwd.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public Result addEmp(EmployeeDTO dto) {
        //1.判断非空
        if (dto.getUsername() == null){
            return Result.error(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //2.根据账号查询数据库是否存在,如果存在,则直接返回错误信息
        Employee employee = employeeMapper.getByUsername(dto.getUsername());
        if (employee != null){
            return Result.error(MessageConstant.ACCOUNT_EXEIT_FOUND);
        }

        //3.新增操作,调用mapper接口
        employee = new Employee();

        /**
         * beanutils工具类，进行bean对象属性的拷贝使用
         * 要求，两个对象中的属性名称和属性类型必须完全一致的情况才可以拷贝成功，否则失败
         */

        BeanUtils.copyProperties(dto,employee);
        //默认密码123456

        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //状态
        employee.setStatus(StatusConstant.ENABLE);

        //创建时间和修改时间
        employee.setUpdateTime(LocalDateTime.now());
        employee.setCreateTime(LocalDateTime.now());

        //创建人和修改人 TODO
        employee.setCreateUser(1L);
        employee.setUpdateUser(1L);


        employeeMapper.insert(employee);

        //4.返回数据
        return Result.success();
    }

    /**
     * 分页查询
     *
     * @param dto
     * @return
     */
    @Override
    public Result page(EmployeePageQueryDTO dto) {
        //1.判断非空
        if (dto.getPage() == null){
            dto.setPage(1);
        }

        if (dto.getPageSize() == null){
            dto.setPageSize(5);
        }
        //2.开启分页
        PageHelper.startPage(dto.getPage(),dto.getPageSize());

        //3.根据条件查询员工列表调用Mapper
        Page<Employee> pageParam = employeeMapper.pageQuery(dto);

        //4.封装数据并返回
        PageResult pageResult = new PageResult();
        pageResult.setRecords(pageParam.getResult());
        pageResult.setTotal(pageParam.getTotal());

        return Result.success(pageResult);
    }

    /**
     * 禁用/启用员工状态
     *
     * @param status
     * @param id
     * @return
     */
    @Override
    public Result updateEmpStatus(Integer status, Long id) {
        //1.非空判断
        if (id == null){
            return Result.error(MessageConstant.ACCOUNT_NOT_FOUND);
        }
        //2.调用mapper接口，修改状态值
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateEmp(employee);

        //3.返回数据
        return Result.success(employee);
    }

    /**
     * 数据回显
     *
     * @param id
     * @return
     */
    @Override
    public Result getEmpById(Long id) {
        //1.判断非空
        if (id == null){
            return Result.error(MessageConstant.ACCOUNT_NOT_FOUND);
        }
        //2.调用mapper接口
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("********");

        //3.返回数据
        return Result.success(employee);
    }

    /**
     * 修改数据
     *
     * @param employee
     * @return
     */
    @Override
    public Result updateEmp(Employee employee) {
        //1.判断非空
        if (employee == null){
            return Result.error(MessageConstant.ID_NOT_FOUND);
        }

        //2.调用mapper接口
        Employee employee1 = new Employee();
        BeanUtils.copyProperties(employee,employee1);

        //修改时间,修改人
        employee1.setUpdateTime(LocalDateTime.now());
        employee1.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateEmp(employee1);

        //3.返回数据
        return Result.success();
    }
}
